TABLE 1 - Chemical composition % (ladle analysis) as specified in SABS 1431, 1987
|
| Maximum chemical composition1) |
Grade |
C |
Mn |
Si |
P |
S |
Nb |
V |
Nb + V |
Al |
Cu1) |
Ni2) |
Cr2) |
Mo2) |
Normal supply conditions |
240WA |
0.22 |
1.60 |
0.50 |
0.040 |
0.050 |
0.01 |
0.03 |
0.04 |
0.10 |
0.35 |
0.30 |
0.30 |
0.10 |
As rolled |
240WC |
0.22 |
1.60 |
0.50 |
0.040 |
0.050 |
0.01 |
0.03 |
0.04 |
0.10 |
0.35 |
0.30 |
0.30 |
0.10 |
As rolled |
240WDD |
0.22 |
1.60 |
0.50 |
0.040 |
0.040 |
0.10 |
0.10 |
0.10 |
0.10 |
0.35 |
0.30 |
0.30 |
0.10 |
Normalised |
300WA |
0.22 |
1.60 |
0.50 |
0.040 |
0.050 |
0.03 |
0.03 |
0.04 |
0.10 |
0.35 |
0.30 |
0.30 |
0.10 |
As rolled |
300WC |
0.22 |
1.60 |
0.50 |
0.040 |
0.050 |
0.03 |
0.03 |
0.04 |
0.10 |
0.35 |
0.30 |
0.30 |
0.10 |
As rolled |
300WDD |
0.22 |
1.60 |
0.50 |
0.040 |
0.040 |
0.10 |
0.10 |
0.10 |
0.10 |
0.35 |
0.30 |
0.30 |
0.10 |
Normalised |
350WA |
0.22 |
1.60 |
0.50 |
0.040 |
0.040 |
0.10 |
0.10 |
0.10 |
0.10 |
0.35 |
0.30 |
0.30 |
0.10 |
As rolled |
350WC |
0.22 |
1.60 |
0.50 |
0.040 |
0.040 |
0.10 |
0.10 |
0.10 |
0.10 |
0.35 |
0.30 |
0.30 |
0.10 |
As rolled < 16 mm thick
Normalised3)
> 16mm |
350WDD |
0.22 |
1.60 |
0.50 |
0.040 |
0.040 |
0.10 |
0.10 |
0.10 |
0.10 |
0.35 |
0.30 |
0.30 |
0.10 |
Normalised |
TABLE 2 - Typical chemical composition |
| Chemical composition |
| Grade |
C1) |
Si |
Mn2) |
P
(max) |
S3)
(max) |
Al |
Nb |
V |
N |
| 240WA |
0.12 |
0.254) |
1.0 |
0.020 |
0.030 |
0.035 |
- |
- |
- |
| 240WC |
0.12 |
0.254) |
1.0 |
0.020 |
0.030 |
0.035 |
- |
- |
- |
| 240WDD |
0.12 |
0.25 |
1.0 |
0.020 |
0.030 |
0.035 |
- |
- |
- |
| 300WA |
0.18 |
0.354) |
1.35 |
0.020 |
0.030 |
0.035 |
- |
- |
- |
| 300WC |
0.18 |
0.354) |
1.35 |
0.020 |
0.030 |
0.035 |
- |
- |
- |
| 300WDD |
0.18 |
0.35 |
1.35 |
0.020 |
0.030 |
0.035 |
- |
- |
- |
| 350WA |
0.15 |
0.35 |
1.25 |
0.020 |
0.030 |
0.035 |
0.028 |
- |
- |
| 350WC |
0.15 |
0.35 |
1.25 |
0.020 |
0.030 |
0.035 |
0.028 |
- |
- |
| 350WDD |
0.15 |
0.35 |
1.25 |
0.020 |
0.030 |
0.035 |
0.028 |
- |
- |
TABLE 3 - Mechanical properties as specified in SABS 1431 - 1987: Table 5 |
| Grade |
Tensile
strength
(MPa) |
Min yield strength (MPa) for thickness t (mm) |
Elongation % (min) on gauge length of |
Charpy V-notch impact test |
3<t<16 |
16<t<40 |
40<t<63 |
63<t<80 |
50 mm |
200 mm |
5.65 So |
Avrage
impact
resistance J (min) |
Test
Tempe-
rature
(oC) |
Thickness
(max)
(mm) |
| 240WA |
380/510 |
240 |
240 |
230 |
220 |
28 |
20 |
22 |
- |
- |
- |
| 240WC |
380/510 |
240 |
240 |
230 |
220 |
28 |
20 |
22 |
27 |
0 |
80 |
| 240WDD |
380/510 |
240 |
240 |
230 |
220 |
28 |
20 |
22 |
27 |
-30 |
80 |
| 300WA |
450/620 |
300 |
300 |
290 |
280 |
24 |
20 |
22 |
- |
- |
- |
| 300WC |
450/620 |
300 |
300 |
290 |
280 |
24 |
20 |
22 |
27 |
0 |
63 |
| 300WDD |
450/620 |
300 |
300 |
290 |
280 |
24 |
20 |
22 |
27 |
-30 |
63 |
| 350WA |
480/650 |
350 |
350 |
340 |
325 |
22 |
18 |
20 |
- |
- |
- |
| 350WC |
480/650 |
350 |
350 |
340 |
325 |
22 |
18 |
20 |
27 |
0 |
80 |
| 350WDD |
480/650 |
350 |
350 |
340 |
325 |
22 |
18 |
20 |
27 |
-30 |
80 |
